--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/stress-tester/src/main/java/com/passus/st/emitter/StaticMACAddressResolver.java	Tue Mar 24 10:03:56 2020 +0100
@@ -0,0 +1,74 @@
+package com.passus.st.emitter;
+
+import com.passus.commons.Assert;
+import com.passus.net.IpAddress;
+import com.passus.net.MACAddress;
+import com.passus.st.Pair;
+
+import java.text.ParseException;
+import java.util.HashMap;
+import java.util.Map;
+
+public class StaticMACAddressResolver implements MACAddressResolver {
+
+    private final Map<IpAddress, MACAddress> map = new HashMap<>();
+
+    public void add(String pairStr) throws ParseException {
+        Pair<IpAddress, MACAddress> pair = parse(pairStr);
+        add(pair);
+    }
+
+    public void add(Pair<IpAddress, MACAddress> pair) {
+        add(pair.getValue1(), pair.getValue2());
+    }
+
+    public void add(IpAddress ip, MACAddress mac) {
+        Assert.notNull(ip, "ip");
+        Assert.notNull(mac, "mac");
+        map.put(ip, mac);
+    }
+
+    @Override
+    public MACAddress resolve(IpAddress ip) {
+        return map.get(ip);
+    }
+
+    public static boolean validate(String pairStr) {
+        try {
+            parse(pairStr);
+            return true;
+        } catch (ParseException e) {
+            return false;
+        }
+    }
+
+    public static Pair<IpAddress, MACAddress> parse(String pairStr) throws ParseException {
+        String separator = "->";
+
+        int pos = pairStr.indexOf(separator);
+        if (pos != -1) {
+            MACAddress mac;
+            IpAddress ip;
+
+            String ipStr = pairStr.substring(0, pos).trim();
+            try {
+                ip = IpAddress.parse(ipStr);
+            } catch (Exception e) {
+                throw new ParseException(e.getMessage(), pos);
+            }
+
+            pos += separator.length();
+            String macStr = pairStr.substring(pos);
+            try {
+                mac = new MACAddress(macStr.trim());
+            } catch (Exception e) {
+                throw new ParseException(e.getMessage(), pos);
+            }
+
+            return new Pair<>(ip, mac);
+        }
+
+        throw new ParseException("Invalid MAC-IP pair.", 0);
+    }
+
+}